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Biomedical subjects

B Borden

Publications and source records attributed to B Borden.

5 recordsLinked to original sources
PubMed1995

Biomechanical and clinical evaluation of the epitenon-first technique of flexor tendon repair.

Thirteen matched pairs of canine flexor tendons were repaired using both the Epitenon-first and the modified Kessler with an epitendinous running suture. These were then tested to failure with a longitudinal force in an Instron test machine. Human cadaver flexor digitorum profundus tendons were used to determine the cross sectional area of the tendon that is displaced by suture material of the Kessler repair and Epitenon-first core suture. Results of biomechanical testing revealed the epitenon-first technique to be 22% stronger than the modified Kessler technique. Comparison of tendon repair cross sectional contact areas by digital scanning of surface photomicrographs demonstrated 20% of the surface area of the repair is occupied by the knot of the modified Kessler technique, while the core suture of the epitenon-first repair consumed only 2.6% of the cross sectional area. These findings correlate with our clinical results of 26 zone II flexor tendon repairs in 18 patients repaired with the epitenon-first technique over a 4-year period. Of these, there has been one rupture and no repeat operations for lysis of adhesions.

Adolescent↗
PubMed1989

Effectiveness of a writing system using a computerized long-range optical pointer and 10-branch abbreviation expansion.

Many individuals with limited abilities require specialized technological writing systems. These individuals and the clinicians and engineers who work with them need information regarding the effectiveness of various systems. This study developed a methodology for assessing the effectiveness of a technological writing support system and evaluated its success. The Long-Range Optical Pointer and 10-Branch Abbreviation Expansion System developed at the Trace R&D Center at the University of Wisconsin was used. The study applied a single subject research design: a series of AB replications with naturally-occurring baselines comparing data within subjects across behavior, and across subjects. Behaviors assessed included typing rate, efficiency, and accuracy. The results demonstrate the effectiveness of this system with four individuals with severe physical disabilities and one able-bodied person. Among the data collected, typing rates were found to range from 3 to 15 words per minute, with suspected dependency on familiarity with the system. Discussion highlights the potential benefits of this system and the critical requirement to individually assess a person's needs in order to appropriately select and prescribe these types of technology. The need for further application-oriented single-subject research as well as classical human factors research is emphasized.

Adult↗
PubMed1982

Transplantation of enzyme-treated teeth in the monkey Macaca fascicularis.

Homologous tooth transplants evoke immunogenic rejection against antigens within donor periodontal ligaments cells and ground substance. Eight maxillary incisors of 6 juvenile animals were extracted, crowns and pulps removed by gutta percha; the roots were incubated serially in enzyme solutions and glutaraldehyde at 37 degrees C for 5 h to destroy cells, glycoproteins and proteoglycans. Seven control teeth from the same 6 animals were incubated in saline at 37 degrees C for 15 min. All teeth were then speedily transplanted to other animals which were killed at 6 wk or 3 months. Radiographs and histologic sections revealed extensive resorption and inflammation of all control teeth. Enzyme-treated teeth showed less inflammation with resorption mostly on the surface of the cut coronal dentine. A loose fibrous attachment usually formed on most aspects of the root surface with deposition of new cellular cementum within the donor ligament. Inflammation, where present, may have resulted from incomplete removal of periodontal ligament cells, ground substance, or from salivary bacterial contamination.

Animals↗